Security readout for executives and security teams
Plain-English summary
CVE-2020-36709 affects the WordPress Page Builder: KingComposer plugin before 2.9.4. An authenticated user could save malicious script into page content through shortcode handling, causing the script to run when someone views that page. This is a website integrity and session-risk issue, not a server takeover based on the provided sources.
Executive priority
Treat this as a moderate website security backlog item. Prioritize remediation on public WordPress sites, sites with many editors, or sites where administrator sessions are high-value.
Technical view
The issue is stored cross-site scripting caused by insufficient shortcode input sanitization and output escaping in KingComposer before 2.9.4. It is tracked as CWE-79 with CVSS 3.1 score 5.5, vector AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N. The provided evidence indicates authenticated access is required.
Likely exposure
Exposure is likely limited to WordPress sites running KingComposer versions earlier than 2.9.4, especially where authenticated users can create or edit content using the affected shortcode paths.
Exploitation context
The source bundle does not show CISA KEV listing or cited active exploitation. Practical risk depends on whether attackers can obtain suitable authenticated access and whether malicious stored content reaches administrators or visitors.
Researcher notes
Evidence supports stored XSS before 2.9.4, but the supplied affected-product metadata is sparse and lists no CPEs. Do not assume unauthenticated exploitation or broader KingComposer products from this bundle alone.
Mitigation direction
- Upgrade Page Builder: KingComposer to version 2.9.4 or later.
- If immediate upgrade is not possible, disable the plugin until vendor guidance is applied.
- Restrict content-editing privileges to trusted accounts only.
- Review vendor and WordPress plugin guidance for any additional remediation.
- Remove suspicious stored scripts from affected pages after patching.
Validation and detection
- Inventory WordPress sites for the KingComposer plugin.
- Confirm the installed plugin version is 2.9.4 or later.
- Review pages using KingComposer shortcodes for unexpected script content.
- Check WordPress user accounts with content-editing privileges.
- Review recent page edits for suspicious authenticated activity.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-36709 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N2.32.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/6447de64-b484-4f64-ad78-7df81b5a0ed7?source=cveCVE reference
- https://blog.nintechnet.com/wordpress-kingcomposer-page-builder-fixed-multiple-critical-vulnerabilities/CVE reference
- https://wpsocket.com/plugin/kingcomposer/changelog/CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.